Touch pen, touch display device and touch system

Abstract

The invention relates to the technical field of touch display devices, and discloses a touch pen, a touch display device and a touch system.The touch pen comprises a pen body, a light emitting source, a first control device and a light path control assembly; the pen body is provided with an accommodating space; the first control device is located in the containing space and used for controlling the light emitting source to emit light. The luminous source is positioned in the accommodating space or on the pen body; the light path control assembly is used for guiding the light emitted by the light emitting source to a photosensitive element in the touch display device so that the touch display device can determine the touch position of the touch pen on a touch surface, and the touch surface is the surface of a display screen in the touch display device. The light is guided through the light path control assembly, and the accuracy of the finally determined touch position can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of touch display devices, in particular to a touch pen, a touch display device and a touch system. BACKGROUND

[0002] As an input medium, the touch screen is a relatively simple and convenient human-computer interaction method, which is widely used in various electronic devices, such as interactive touch all-in-one machine, mobile phone, tablet computer or computer, etc. In order to improve the writing experience and effect of the user, the device with the touch screen is usually configured with a touch pen. The touch pen made of optical characteristics and the touch screen have the advantages of stable performance, strong anti-interference ability, long service life and high precision, and are widely used in the touch field.

[0003] However, the commonly used optical touch pen is usually a pure structure form, and the optical sensor (such as a camera or infrared light, etc.) can only identify that the object blocks the light or that there is a touch object at a certain distance, which may result in low accuracy of the finally determined touch coordinates, and the multiple touch pens cannot be distinguished, which leads to that the touch screen cannot make different responses to the touches of different people when multiple people discuss, and affects the user experience. SUMMARY

[0004] Therefore, the present application provides a touch pen, a touch display device and a touch system to solve the problem of low accuracy of the finally determined touch coordinates and affect the user experience.

[0005] In a first aspect, the present application provides a touch pen, which comprises a pen body, a light emitting source, a first control device and a light path control assembly. The pen body has a containing space. The first control device is located in the containing space and is used to control the light emitting source to emit light. The light emitting source is located in the containing space or on the pen body. The light path control assembly is used to guide the light emitted by the light emitting source to a photosensitive element in a touch display device, so that the touch display device determines the touch position of the touch pen on a touch surface, wherein the touch surface is the surface of a display screen in the touch display device.

[0006] In the embodiment, the light emitted by the light emitting source is guided to the photosensitive element in the touch display device by the light path control assembly, so that the touch display device determines the touch position of the touch pen on the touch surface based on the photosensitive element receiving the light, thereby improving the accuracy of the finally determined touch coordinates.

[0007] In an optional implementation, the first control device is further used to determine coding information and control the working state of the light emitting source based on the coding information, wherein the working state comprises at least one of the on-off state, the on-off switching frequency and the on-off duration, and the coding information is used to represent the identity information of the touch pen.

[0008] In the embodiment, the first control device determines the encoding information, and controls the working state of the light source based on the encoding information, different encoding information can be set for the plurality of styluses in contact with the touch display device, the touch display device can distinguish the plurality of styluses in contact therewith, and the corresponding response can be made, and the user experience is improved.

[0009] In an optional embodiment, the number of the light source is multiple, and the wavelengths of the light emitted by each light source are different; the first control device is further configured to control the working state of a target light source based on the encoding information, wherein the target light source is one of the multiple light sources.

[0010] In the embodiment, the encoding information and the target light source are controlled, and more styluses can be distinguished by the touch display device.

[0011] In an optional embodiment, the number of the light source is multiple, and the wavelengths of the light emitted by each light source are different; the first control device is further configured to control the working state of a target light source based on the encoding information, wherein the target light source is one of the multiple light sources.

[0012] In the embodiment, the light emitted by the multiple light sources is superimposed, the light intensity is improved, the light emitted by the stylus can be received by the touch device, and the touch display device can respond to the user operation.

[0013] In an optional embodiment, the wavelength of the light emitted by the light source is a target wavelength, and the target wavelength is used to represent the identity information of the stylus.

[0014] In the embodiment, the identity information of the stylus is directly determined by the wavelength of the light emitted by the stylus, no additional setting is required, the identity information of the stylus can be determined more quickly and conveniently, and the manufacturing cost of the stylus is reduced.

[0015] In an optional embodiment, the light path control assembly is configured to guide the light emitted by the light source out of the accommodation space, and form at least two preset direction light beams outside the accommodation space, wherein the at least two preset direction light beams are respectively in contact with the at least one photosensitive element.

[0016] In the embodiment, the light emitted by the light source is converted into at least two preset direction light beams, and is guided to the photosensitive element in the touch display device, the position of the stylus can be determined more quickly and accurately by the touch display device.

[0017] In an optional embodiment, the pen body comprises a pen tip and a pen shaft, the pen tip and the pen shaft are connected, the light path control assembly comprises a first light cover and a first reflecting element; the first reflecting element is located in the first light cover and has a first reflecting surface, the first reflecting surface is used for changing the propagation direction of the light emitted by the light emitting source; the first light cover is a part of the pen tip, or the first light cover is a part of the pen shaft, or the pen tip and the pen shaft are connected through the first light cover; wherein the transmittance of the first light cover to the light corresponding to the at least two preset directions is greater than a preset transmittance, or the first light cover is provided with a through hole corresponding to the at least two preset directions.

[0018] In the embodiment, the first light cover and the first reflecting element have simple structures and low manufacturing difficulty, which is conducive to reducing the manufacturing cost of the stylus.

[0019] In an optional embodiment, the profile arithmetic average deviation of the reflecting surface is less than or equal to a first preset value, and / or the micro-roughness ten-point height of the reflecting surface is less than or equal to a second preset value, wherein the profile arithmetic average deviation and the micro-roughness ten-point height are indexes for characterizing the surface roughness of the reflecting surface.

[0020] In the embodiment, the reflecting surface has good reflecting ability, and can avoid that the roughness is too large to cause a large light intensity loss of the reflecting light path control assembly.

[0021] In an optional embodiment, the pen body comprises a pen tip and a pen shaft, the pen tip and the pen shaft are connected, the light path control assembly comprises a second light cover and at least two second reflecting elements arranged along at least two preset directions, the at least two preset directions and the at least two second reflecting elements correspond to each other; the second reflecting element is located in the second light cover and has a second reflecting surface, the second reflecting surface is used for changing the propagation direction of the light emitted by the light emitting source, and for making the light form a light beam corresponding to the preset direction; the second light cover is a part of the pen tip, or the second light cover is a part of the pen shaft, or the pen tip and the pen shaft are connected through the second light cover; wherein the transmittance of the second light cover to the light is greater than a preset transmittance.

[0022] In the embodiment, the second reflecting element occupies a small space and is convenient to arrange on the pen tip.

[0023] In an optional embodiment, the stylus further comprises an energy storage component; the energy storage component is connected with the light emitting source and the first control device respectively, and is used for providing electric energy for the light emitting source and the first control device.

[0024] In an optional embodiment, the light emitting source is an ultraviolet light emitting source, a visible light emitting source or an infrared light emitting source.

[0025] In the embodiment, when the light emitting source is an ultraviolet light emitting source or an infrared light emitting source, the emitted light is invisible to the user, and the light can be avoided to affect the touch operation of the user.

[0026] In a second aspect, the present application provides a touch display device, comprising a display screen, a shell, a plurality of light sensing elements and a second control device; the shell is connected with the display screen; the plurality of light sensing elements are arranged on the shell and located at the edge of the display screen, and are used for sensing the light emitted by the stylus, wherein the stylus is the stylus of the first aspect or any one of the corresponding embodiments thereof; the second control device is used for determining the touch position of the stylus on the touch surface based on the position of the light sensing element that senses the light, wherein the touch surface is the surface of the display screen.

[0027] In an optional embodiment, the second control device is further used for decoding the received light signal emitted by the stylus, and is used for determining the identity information of the stylus according to the decoded coding information.

[0028] In an optional embodiment, the second control device is further used for determining the identity information of the stylus according to the wavelength of the received light emitted by the stylus.

[0029] In an optional embodiment, the light sensing element is a photoresistor, a camera or an infrared receiving lamp.

[0030] In a third aspect, the present application provides a touch system, comprising at least one stylus of the first aspect or any one of the corresponding embodiments thereof, and the touch display device of the second aspect or any one of the corresponding embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the specific embodiments or the related art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the related art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0032] Figure 1 is a schematic view of the basic structure of the stylus;

[0033] Figure 2a is a schematic view of the structure of a nib of the stylus;

[0034] Figure 2b is a schematic view of the structure of another nib of the stylus;

[0035] Figure 3 is a schematic view of the structure of the stylus according to the embodiment of the present application;

[0036] Figure 4 is a schematic diagram of a preset direction according to an embodiment of the present application;

[0037] Figure 5 is a structural schematic diagram of a light path control component according to an embodiment of the present application;

[0038] Figure 6 is a structural schematic diagram of a first reflecting element according to an embodiment of the present application;

[0039] Figure 7 is a structural schematic diagram of another light path control component according to an embodiment of the present application;

[0040] Figure 8 is a structural schematic diagram of still another light path control component according to an embodiment of the present application;

[0041] Figure 9 is a structural schematic diagram of yet another light path control component according to an embodiment of the present application;

[0042] Figure 10 is a specific structural schematic diagram of a light path control component according to an embodiment of the present application;

[0043] Figure 11 is a structural schematic diagram of another stylus according to an embodiment of the present application;

[0044] Figure 12 is a structural schematic diagram of a touch display device according to an embodiment of the present application;

[0045] Figure 13 is a schematic diagram of a light beam position according to an embodiment of the present application;

[0046] Figure 14 is a schematic diagram of another light beam position according to an embodiment of the present application;

[0047] Figure 15 is a flowchart of a process of determining stylus identity information and stylus position by a touch display device according to an embodiment of the present application;

[0048] Figure 16 is a flowchart of a process of determining stylus identity information and stylus position by another touch display device according to an embodiment of the present application.

[0049] 100, pen body; 110, pen tip; 120, pen cap; 130, pen barrel; 131, accommodating space; 140, light emitting source; 150, first control device; 160, light path control assembly; 161, first light cover; 162, first reflecting element; 162a, first reflecting surface; 163, second light cover; 164, second reflecting element; 164a, second reflecting surface; 164b, second connecting surface; 170, energy storage component; 1110, display screen; 1120, shell; 1130, light sensing element; 1140, second control device. DETAILED DESCRIPTION

[0050] To make the objects, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0051] When a touch display device such as an interactive touch all-in-one machine is used to record information or for multi-person discussion, for example, when a user discusses a problem in a meeting, when a teacher writes on a blackboard or annotates when checking papers, or when a user plays a parent-child game of connecting pieces, there is a strong demand for touch interaction, and the user will frequently touch the screen for interaction.

[0052] However, in order to improve the reading experience of the user, the outer surface of the touch screen is usually treated with anti-glare (AG) or paper-like processing. For example, for a smart blackboard product in an educational scenario, in order to ensure that students at all angles can clearly identify the screen display, the outer surface of the display of the whole machine is treated with AG or paper-like processing, the touch surface is rough, and frequent touching may cause finger injury, thereby affecting the user experience. Therefore, the touch display device usually matches a touch pen, and writing with the touch pen can improve the writing experience of the user.

[0053] An optical touch pen has the advantages of high precision, being suitable for various touch devices, low power consumption, being not affected by ambient light, and multi-functional operation, and is widely used in touch devices. As shown in Figure 1 The touch pen generally includes a pen tip 110, a pen cap 120, and a pen barrel 130. The structure of the pen tip 110 can be as shown in Figure 2a or Figure 2bAs shown, the existing optical stylus is generally a pure structure stylus without photoelectric devices, which uses the stylus to block the light net on the touch plane when the stylus is on the touch plane, causes the light net to change, and identifies the touch coordinates, or uses a camera or a binocular camera with a time of flight (TOF) sensor to capture the position of the stylus, and then determines the touch coordinates.

[0054] The optical stylus described above is a pure structure form, which can only identify that an object blocks the light or that a touch object exists at a certain distance, which may result in low accuracy of the finally determined touch coordinates, and cannot distinguish multiple styluses, so that the touch screen cannot respond differently to the touches of different people when multiple people discuss, and the user experience is affected.

[0055] Therefore, the present application provides a stylus, which guides the light emitted by the light source to the photosensitive element in the touch display device through the light path control assembly, so that the touch display device determines the touch position of the stylus on the touch surface, and then improves the accuracy of the finally determined touch coordinates.

[0056] Moreover, the control device can also control the working state of the light source based on the coding information, so that the touch display device can distinguish multiple styluses in contact with it by setting different coding information, and then make corresponding responses to improve the user experience.

[0057] The stylus provided by the present application will be described in detail below with reference to the accompanying drawings.

[0058] As shown in the drawings, Figure 3 The stylus includes a pen body 100, a light source 140, a first control device 150 and a light path control assembly 160.

[0059] The pen body 100 includes a pen tip 110 and a pen barrel 130, the pen tip 110 and the pen barrel 130 are connected, the pen body 100 has a containing space 131, the pen barrel 130 is used for holding by the user, the pen tip 110 is used for contacting with the touch surface, the touch surface can be the surface of the display screen in the touch display device, the internal space of the pen tip 110 and the internal space of the pen barrel 130 form the containing space 131 of the pen body 100. The first control device 150 is located in the containing space 131, and the first control device 150 is used for controlling the light source 140 to emit light.

[0060] The present application does not limit the position of the light source 140, for example, the light source 140 can be located in the containing space, or can be arranged on the pen body 100, specifically, the light source 140 can be arranged on the pen tip 110, or can be arranged on the pen barrel 130, for emitting light under the control of the first control device 150.

[0061] The light path control component 160 is arranged on the pen body 100, and is configured to guide the light emitted by the light emitting source 140 to a light sensing element of the touch display device, so that the touch display device can determine the touch position of the stylus on the touch surface based on the light sensing element receiving the light. The manner in which the touch display device determines the touch position (coordinates) based on the light sensing element receiving the light will be described in detail below, and will not be described in detail here.

[0062] In this embodiment, the light emitted by the light emitting source 140 is guided to the light sensing element in the touch display device by the light path control component 160, so that the touch display device determines the touch position of the stylus on the touch surface based on the light sensing element receiving the light, thereby improving the accuracy of the finally determined touch position.

[0063] Specifically, the specific structure of the first control device 150 is not limited by the present application, for example, the first control device 150 can be a control circuit or a microprocessor, etc. The type of the light emitting source 140 is also not limited by the present application, for example, the light emitting source 140 can be an ultraviolet light emitting source, a visible light emitting source or an infrared light emitting source.

[0064] Further, the first control device 150 is further configured to determine the coding information, and control the working state of the light emitting source 140 based on the coding information, wherein the working state includes at least one of the on-off state, the on-off switching frequency (for example, 100KHz) and the on-off duration (for example, 0.5s, 1s or 2s, etc.), and the coding information is used to represent the identity information of the stylus.

[0065] The coding information of each stylus is different. The coding information can be pre-configured in the first control device 150 by the designer, or can be automatically generated by the first control device 150.

[0066] For example, the coding information can be represented by binary digits, for example, the coding information can be "10001011", wherein binary digit 1 represents on, and binary digit 0 represents off. That is, the coding information can be represented by the on-off switching frequency, the on-off duration or the on-off time of the light emitting source 140, to represent the identity information of the stylus.

[0067] That is, the first control device 150 represents the determined coding information by controlling the working state of the light emitting source 140, so that the touch display device can identify the identity information of the stylus based on the coding information, thereby distinguishing different styluses and realizing the multi-pen multi-color function. The manner in which the touch display device identifies the identity information of the stylus based on the coding information will be described in detail below, and will not be described in detail here.

[0068] Specifically, the first control device 150 can adjust the duty cycle of the pulse width modulation signal based on the coding information, so that the light emitting source 140 flashes at a preset frequency (for example, 100 kHz, etc.), and the coding of the light signal is realized.

[0069] In the embodiment, the coding information is determined by the first control device 150, and the working state of the light emitting source 140 is controlled based on the coding information. Different coding information can be set for multiple styluses in contact with the touch display device, so that the touch display device can distinguish multiple styluses in contact with it, and make corresponding responses (for example, multi-pen multi-color function), thereby improving the user experience.

[0070] It should be noted that the present application does not limit the way the first control device 150 controls the working state of the light emitting source 140. For example, the first control device can control the working state of the light emitting source 140 by controlling the working state (on or off) of the switching tube. For another example, the first control device 150 can also control the working state of the light emitting source 140 through the optical encoder. The switching tube can be a switching device such as a metal oxide semiconductor field effect transistor (MOSFET) or a triode.

[0071] The present application does not limit the number of light emitting sources 140, which can be one or more. When the number of light emitting sources is 1, the light emitting source occupies less space, which is beneficial to the layout optimization of the first control device 150 and the light emitting source 140.

[0072] For example, the number of light emitting sources 140 can be multiple, and the wavelengths of the multiple light emitting sources 140 are the same, for example, the multiple light emitting sources 140 are all ultraviolet light emitting sources. In the case where the wavelengths of the multiple light emitting sources 140 are the same, the first control device 150 is further configured to control the working state of the multiple light emitting sources 140 based on the coding information. That is, the first control device 150 controls the working state of the multiple light emitting sources 140 based on the coding information, and the working states of the multiple light emitting sources 140 are synchronized.

[0073] In the embodiment, the light emitted by the multiple light sources is superimposed, which can improve the light intensity and ensure that the touch device can receive the light emitted by the stylus, and the touch display device can accurately respond to the user operation.

[0074] Exemplarily, in the case that the number of the light emitting sources 140 is multiple, the wavelengths of the multiple light emitting sources 140 can also be different, for example, the multiple light emitting sources 140 can be ultraviolet light emitting source, visible light emitting source and infrared light emitting source respectively. In the case that the wavelengths of the multiple light emitting sources 140 are different, the first control device 150 is further configured to control the working state of the target light emitting source based on the encoding information. Wherein, the target light emitting source is one of the multiple light emitting sources.

[0075] In the embodiment, by controlling the encoding information and the target light emitting source, the touch display device can distinguish more number of touch pens.

[0076] In the case that the number of the light emitting sources is multiple and the wavelengths of the multiple light emitting sources are different, the first control device 150 can also not control the working state of the target light emitting source based on the encoding information, at this time, the first control device 150 can directly control the target light emitting source to emit light based on the user operation. That is, the touch display device distinguishes the multiple touch pens in contact with the touch surface through the wavelength of the light.

[0077] For example, the touch system includes multiple touch pens, each of which includes multiple light emitting sources, and the wavelengths of the light emitting sources are different, and the touch pen is also provided with a button, when the user selects the button 1, the first control device 150 controls the light emitting source with wavelength P to emit light, when the user selects the button 2, the first control device 150 controls the light emitting source with wavelength Q to emit light, and the touch display device distinguishes the multiple touch pens based on the wavelength of the received light.

[0078] In some optional embodiments, the number of the light emitting sources 140 can be one, and the wavelength of the light emitted by the light emitting source 140 is the target wavelength, at this time, the identity information of the touch pen can also be represented by the target wavelength.

[0079] For example, the touch system includes a first touch pen, a second touch pen and a third touch pen, wherein the wavelength of the light emitted by the light emitting source of the first touch pen is 860nm, the wavelength of the light emitted by the light emitting source of the second touch pen is 940nm, and the wavelength of the light emitted by the light emitting source of the third touch pen is 1050nm, if the wavelength of the light received by the touch display device is 860nm, the touch display device can determine that the touch pen is the first touch pen.

[0080] The light path control assembly 160 in the touch pen will be described in detail below in combination with the drawings.

[0081] The touch display device includes a plurality of light sensing elements located at the edge of the display screen. The light path control component 160 is configured to direct the light emitted by the light emitting source 140 out of the accommodation space 131 and form at least two (i.e. multiple) light beams of preset directions outside the accommodation space 131, wherein the at least two light beams of preset directions are in contact with the at least one light sensing element, respectively. Specifically, the light path control component 160 can adjust the original propagation direction of the light emitted by the light emitting source 140 by refraction or reflection, for example, adjust the light emitted by the light emitting source 140 in parallel or close to parallel to the length direction of the pen barrel 130 to the light in parallel to the touch plane, direct the light out of the accommodation space 131, and form at least two light beams of preset directions outside the accommodation space 131.

[0082] The at least two preset directions can be, for example, the extending directions of the three triangles shown in Figure 4 , and the included angle between the light beams of different preset directions is a fixed value.

[0083] In some optional embodiments, the light path control component 160 includes a first light cover 161 and a first reflecting element 162, as shown in Figure 5 and Figure 6 .

[0084] The first reflecting element 162 is located in the first light cover 161 and has a first reflecting surface 162a, as shown in Figure 5 and Figure 6 . The form of the first light cover 161 is not limited in the present application. The first light cover 161 can be a part of the pen tip 110, i.e. the first light cover 161 and the pen tip 110 are integrally formed; the first light cover 161 can also be a part of the pen barrel 130, i.e. the first light cover 161 and the pen barrel 130 are integrally formed; or the first light cover 161 can be independently provided, in which case the pen tip 110 and the pen barrel 130 are connected through the first light cover 161, and the internal space of the first light cover 161 also belongs to the accommodation space 131.

[0085] The first reflecting surface 162a is configured to change the propagation direction of the light emitted by the light emitting source 140. The transmittance of the region A in the first light cover 161 corresponding to the multiple preset directions is greater than a preset transmittance (for example, 70%), i.e. the region A has a relatively high light transmittance, so as to direct the light out of the accommodation space 131 and form the light beams of preset directions. Alternatively, the region A in the first light cover 161 corresponding to the multiple preset directions is provided with a through hole, so as to direct the light out of the accommodation space 131 and form the light beams of preset directions.

[0086] In addition, the first reflecting element 162 further includes a first connecting surface, and the first reflecting element 162 is connected to the aspherical surface of the pen tip 110 through the first connecting surface.

[0087] For example, the material of the region A in the first mask 161 is not limited in the embodiment, as long as the transmittance of the material to the light emitted by the light source is above the preset transmittance. For example, the material of the region A can be a transparent material such as glass, polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), or the like. The material of the region A can also be a material with a transmittance to the light emitted by the light source above the preset transmittance. For example, the wavelength of the light source is 960 nanometers (nm), and the material with a transmittance to the light with a wavelength of 960 nm above the preset transmittance but a low transmittance to light with other wavelengths can be selected, such as an infrared filter.

[0088] For example, the specific shape of the first mask 161 and the first reflecting element 162 is not limited in the embodiment. For example, as shown in FIGS. 1A and 1B, the first mask 161 has a hollow structure, and the first reflecting element 162 has a conical structure. In this case, the first reflecting surface 162a is a conical surface, and the first connecting surface is the bottom surface of the conical structure. In this case, the plurality of preset directions can be the radial direction of the connecting surface. Figure 5 Figure 6 For example, the specific shape of the first mask 161 and the first reflecting element 162 is not limited in the embodiment. For example, as shown in FIGS. 1A and 1B, the first mask 161 has a hollow structure, and the first reflecting element 162 has a conical structure. In this case, the first reflecting surface 162a is a conical surface, and the first connecting surface is the bottom surface of the conical structure. In this case, the plurality of preset directions can be the radial direction of the connecting surface.

[0089] In the embodiment, the structure of the first mask 161 and the first reflecting element 162 is simple, and the manufacturing difficulty is low, which is conducive to reducing the manufacturing cost of the stylus.

[0090] Further, the profile arithmetic average deviation (Ra) of the first reflecting surface 162a is less than or equal to a first preset value (for example, 10 micrometers (um)), and / or the micro-irregularity ten-point height (Rz) of the first reflecting surface 162a is less than or equal to a second preset value (for example, 25 um), where Ra and Rz are indexes for characterizing the surface roughness of the reflecting surface.

[0091] It should be understood that Ra and Rz are two commonly used parameters for quantitatively describing surface roughness. Ra can also be referred to as average roughness, which refers to the average deviation of the height value of the measured surface or profile from the reference line within a certain length range. A smaller Ra value indicates a smoother measured surface, and a larger Ra value indicates a rougher measured surface. Rz can also be referred to as the maximum peak-to-valley height, which refers to the average value of the height difference of the remaining points within a certain length range of the measured surface or profile, excluding the highest and lowest points. Rz focuses more on the local undulation and irregularity of the measured surface or profile, providing more comprehensive information on surface roughness and better reflecting the undulation characteristics of the surface.

[0092] For example, the glossiness of the first reflecting surface 162a is greater than 5 gloss units (GU).​

[0093] In the embodiment, the first reflecting surface 162a has good reflecting ability, and can avoid excessive roughness to cause light intensity loss of the reflective light path control component.

[0094] In some alternative embodiments, as shown in Figure 7 and Figure 8 , the light path control component 160 comprises a second light cover 163 and a plurality of second reflecting elements 164 arranged along a plurality of preset directions, and the plurality of preset directions and the plurality of second reflecting elements 164 correspond one by one.

[0095] As shown in Figures 8 to 10 , the second reflecting element 164 is located in the second light cover 163 and has a second reflecting surface 164a. The form of the second light cover 163 is not limited in the present application. The second light cover 163 can be a part of the pen tip 110, that is, the second light cover 163 and the pen tip 110 are integrally formed. The second light cover 163 can also be a part of the pen barrel 130, that is, the second light cover 163 and the pen barrel 130 are integrally formed. The second light cover 163 can also be independently arranged. At this time, the pen tip 110 and the pen barrel 130 are connected through the second light cover 163, and the internal space of the second light cover 163 also belongs to the accommodation space 131.

[0096] Specifically, the second reflecting surface 164a is used to change the propagation direction of the light emitted by the light emitting source, and is used to form a light beam corresponding to the preset direction. The second light cover 163 has a transmittance greater than a preset transmittance (for example, 70%) to the light, and the light beam forming the preset light is introduced out of the accommodation space 131.

[0097] For example, the second light cover 163 can be made of a transparent material, and the transparent material has a transmittance greater than a preset transmittance to the light. The second light cover 163 can be integrally formed.

[0098] For example, the second light cover 163 can be made of a transparent material, and the transparent material has a transmittance greater than a preset transmittance to the light. The second light cover 163 can be integrally formed.

[0099] Specifically, as shown in Figure 9 , the second reflecting element 164 further comprises a second connecting surface 164b. The second connecting surface 164b is used to support the second reflecting surface 164a and connect the second reflecting surface 164a with the aspherical surface of the pen tip 110, so as to fix the second reflecting surface 164a on the aspherical surface of the pen tip 110.

[0100] In the embodiment, the second reflecting element 164 occupies a small space, which is convenient for being arranged on the pen tip 110.

[0101] Further, as shown in Figure 11 The stylus further comprises an energy storage component 170 connected with the light source 140 and the first control device 150 respectively, for providing electric energy for the light source 140 and the first control device 150. Specifically, the energy storage component 170 can be a battery.

[0102] The present application further provides a touch display device, as shown in Figure 12 The touch display device comprises a display screen 1110, a housing 1120, a plurality of light sensing elements 1130 and a second control device 1140.

[0103] The housing 1120 is connected with the display screen 1110, and the plurality of light sensing elements 1130 are arranged on the housing 1120 and located at the edge of the display screen 1110, for sensing the light emitted by the stylus. The second control device 1140 is used for determining the touch position of the stylus on the touch surface based on the position of the light sensing element sensing the light beam. The stylus is any of the styluses shown in the above embodiments.

[0104] For example, the light sensing elements 1130 can be light-sensitive resistors, cameras or infrared receiving lamps, etc. which can convert light signals into electrical signals, and the second control device 1140 can be a control circuit or a microprocessor.

[0105] Specifically, the light emitted by the light source 140 forms a plurality of light beams of preset directions through the light path control assembly 160 and is guided to the light sensing elements 1130. According to the center points of the light beams of at least two preset directions and the set included angle between the light beams, the touch position (touch coordinate point) of the stylus can be determined. For example, as shown in Figure 13 The light beams 1210 and 1220 are guided to the light sensing elements, and based on the center point a of the light beam 1210, the center point b of the light beam 1220 and the included angle θ between the light beam 1210 and the light beam 1220, the position of the stylus can be determined.

[0106] Exemplarily, the center point of the light beam can be determined based on the position of the light-sensing element that senses the light. For example, in the case that the light-sensing element 1130 is a camera, if 10 pixel points of the sensor of the camera sense the light beam, it can be determined that the center point of the light beam is between the 5th pixel point and the 6th pixel point among the 10 pixel points. For another example, in the case that the light-sensing element 1030 is a photoresistor, taking the case that the shell 1120 is a rectangle as an example, N photoresistors are arranged on each of the four sides (the top side, the bottom side, the left side and the right side) of the rectangle, if the (N-20)th photoresistor to the (N-10)th photoresistor on the left side sense the light beam, it can be determined that the center point of the light beam corresponding to the left side is (N-30) / 2. N is an integer, which can be confirmed by a designer, for example, N can be 50, 100, 120 or 150, etc.

[0107] The accompanying drawings are incorporated herein and constitute a part of the detailed description. Figure 14 The manner in which the second control device 1140 determines the position of the stylus on the touch surface will be described.

[0108] Specifically, as shown in FIG. 11, the stylus forms four light beams in four preset directions, two of the four light beams and the stylus tip can project on the same straight line on the touch surface, forming two intersecting (not limited to obtuse angle or acute angle or right angle) light beams, as shown in FIG. 12, the point a, the point c and the stylus tip position form a straight line, the point b, the point d and the stylus tip position form a straight line, at this time, the intersection E of the two straight lines is the touch coordinate point of the stylus tip. Figure 14 Figure 14

[0109] Specifically, the coordinates (X e , Y e ) of the intersection e of the two straight lines can be determined by the following formula (1):

[0110]

[0111] wherein B1 is the intercept of the straight line ac, B2 is the intercept of the straight line bd, K1 is the slope of the straight line ac, K2 is the slope of the straight line bd, the equation of the straight line ac can be represented as Y1=K1×X1+B1, the equation of the straight line bd can be represented as Y2=K2×X2+B2, (X1, Y1) represents the position coordinates of any point on the straight line ac, (X2, Y2) represents the position coordinates of any point on the straight line bd.

[0112] Exemplarily, B1 can be determined by the following formula (2):

[0113] B1=(X c ×Y a -X a ×Y c ) / (X c -X a ​​)(2)

[0114] wherein (X a , Y a ) is the position coordinate of the center point a, and (X c , Y c ) is the position coordinate of the center point c.

[0115] K1 can be determined by the following formula (3):

[0116] K1 = (Y c - Y a ) / (X c - X a ) (3)

[0117] B2 can be determined by the following formula (4):

[0118] B2 = (X d × Y b - X b × Y d ) / (X d - X b ) (4)

[0119] wherein (X b , Y b ) is the position coordinate of the center point b, and (X d , Y d ) is the position coordinate of the center point d.

[0120] K2 can be determined by the following formula (5):

[0121] K2 = (Y d - Y b ) / (X d - X b ) (5)

[0122] Specifically, when the angle θ between the straight line ac and the straight line bd is 90°, the straight line ac and the straight line bd are perpendicular to each other, the relationship between K1 and K2 is k1×k2=-1, and when the angle θ between the straight line ac and the straight line bd is not 90°, the relationship between K1, K2 and θ is tanθ=|k2-k1| / (1+k1×k2).

[0123] The above method of distinguishing the stylus by the touch display device includes coding information and / or wavelength. The process of determining the stylus identity information by the touch display device will be described in detail below with reference to the accompanying drawings.

[0124] In some optional embodiments, when the first control device controls the working state of the light source based on the coded information, the second control device can be configured to decode the light emitted by the stylus according to the received light, and determine the identity information of the stylus according to the decoded coded information.

[0125] Specifically, when the first control device controls the working state of the light source based on the coded information, the second control device can obtain the on-off interval duration (on-off switching frequency) or on-off duration (on-off period) of the light emitted by the light source through the photosensitive element of the touch display device. The second control device can decode the light emitted by the stylus based on the on-off switching frequency or on-off duration of the light emitted by the light source, and obtain the coded information of the stylus. The second control device compares the coded information of the stylus with the preset coded information of the stylus, and determines the identity information of the stylus.

[0126] For example, it is assumed that the touch display device is equipped with four styluses, the wavelengths of the light sources of the four styluses are the same, but the coded information is different. For example, the coded information of the first stylus is "0xA1", i.e., the identity information (Identifier, ID) 1 is "0xA1", the coded information of the second stylus is "0xA5", i.e., ID 2 is "0xA5", the coded information of the third stylus is "0xA9", i.e., ID 3 is "0xA9", and the coded information of the fourth stylus is "0xAD", i.e., ID 4 is "0xAD". At this time, if the second control device decodes the coded information as "0xA5" according to the working state (e.g., on-off duration or on-off switching frequency) of the stylus, it can be determined that the stylus is the stylus with ID ID 2.

[0127] The process of determining the identity of the stylus and the position of the stylus of the touch display device will be described below. Figure 15 The process of determining the identity of the stylus and the position of the stylus of the touch display device will be described below.

[0128] First, the touch display device sets the receiving sensor (photosensitive element) to the collection mode, i.e., step S1501, and then the touch display device detects whether there is a stylus on the touch surface, i.e., step S1502. Specifically, the stylus is in the emission state, and if the photosensitive element receives light, the touch display device can determine that there is a stylus on the touch surface. Alternatively, the receiving sensor can also include a pressure sensor or other sensors, so that the touch display device can detect the stylus when the stylus is on the touch surface.

[0129] When the stylus exists on the touch surface, the touch display device collects the light-on and light-off period or the light-on and light-off interval information of the light beam by the photosensitive element to decode the received light beam to obtain the coding information (i.e. identity information) of the stylus, i.e. step S1503 is performed. After determining the identity information of the stylus, the touch display device matches the identity information of the stylus with the preset identity information, and determines whether the identity information of the stylus belongs to the preset identity information, i.e. steps S1504 and S1505 are performed. Specifically, the identity information of the stylus can be matched with the preset identity information. If the identity information of the stylus is the same as the preset identity information, the identity information of the stylus belongs to the preset identity information. If the identity information of the stylus is not the same as the preset identity information, the identity information of the stylus does not belong to the preset identity information.

[0130] In the case that the identity information of the stylus belongs to the preset identity information, the identity information of the stylus is output, i.e. step S1506 is performed. In the case that the identity information of the stylus does not belong to the preset identity information or the identity information of the stylus is not obtained, it is considered that it is not the stylus that touches the touch surface, i.e. it is considered that the user touches the touch surface by hand, i.e. step S1507 is performed.

[0131] In addition, when the stylus exists on the touch surface, the touch display device also determines the touch position (touch coordinates) of the stylus according to the position of the photosensitive element that receives the light, i.e. step S1508 is performed.

[0132] After determining the touch position of the stylus and whether it is the stylus (in the case that it is the stylus, the identity information of the stylus is included), the touch position and the information whether it is the stylus are integrated, and the touch coordinates and the information whether it is the stylus are output to the application layer to realize the "multi-pen multi-color" function, i.e. steps S1509 and S1510 are performed.

[0133] In some other optional embodiments, when the first control device controls the light source to emit light, the second control device is configured to determine the identity information of the stylus according to the wavelength of the light emitted by the stylus.

[0134] It should be noted that in the present embodiment, the photosensitive element includes multiple types, and the multiple types of photosensitive elements correspond to different wavelengths of light sources, i.e. the various types of photosensitive elements are sensitive to the corresponding wavelength of light source, i.e. the various types of photosensitive elements are triggered only by the light source of the corresponding wavelength. The types of photosensitive elements correspond to different wavelengths of styluses matched with the touch display device. The working state of the stylus can be constant.

[0135] For example, the touch display device is equipped with 4 styluses, and the 4 styluses respectively use infrared light sources with different wavelengths. For example, the first stylus emits light with a wavelength of 850 nm, i.e., ID5 is 850 nm, the second stylus emits light with a wavelength of 880 nm, i.e., ID6 is 880 nm, the third stylus emits light with a wavelength of 940 nm, i.e., ID7 is 940 nm, and the fourth stylus emits light with a wavelength of 1050 nm, i.e., ID8 is 1050 nm. At this time, the touch display device includes 4 types of light-sensitive elements, which are sensitive to light with wavelengths of 850 nm, 880 nm, 940 nm, and 1050 nm, respectively.

[0136] Specifically, when the first control device controls the light-emitting source to emit light, the second control device can determine the wavelength of the light emitted by the stylus according to the triggered light-sensitive element, and further determine the identity information of the stylus.

[0137] For example, it is assumed that the touch display device includes 4 types of light-sensitive elements, the first type of light-sensitive element is sensitive to light with a wavelength of 850 nm, the second type of light-sensitive element is sensitive to light with a wavelength of 880 nm, the third type of light-sensitive element is sensitive to light with a wavelength of 940 nm, and the fourth type of light-sensitive element is sensitive to light with a wavelength of 1050 nm. If the third type of light-sensitive element is triggered, it indicates that the wavelength of the stylus is 940 nm, and it can be determined that the stylus is the stylus with ID ID7.

[0138] The process of determining the identity information and the position of the stylus of the touch display device will be described below. Figure 16 The process of determining the identity information and the position of the stylus of the touch display device will be described below.

[0139] First, the touch display device makes the receiving sensor (light-sensitive element) in the collection mode, i.e., step S1601 is performed, and then the touch display device detects whether there is a stylus on the touch surface, i.e., step S1602 is performed. Specifically, the stylus is in an emission state, and if the light-sensitive element receives light, the touch display device can determine that there is a stylus on the touch surface. Alternatively, the receiving sensor can also include a pressure sensor or other sensors, so that the touch display device can detect whether there is a stylus when the stylus is on the touch surface.

[0140] When the stylus exists on the touch surface, the touch display device determines the wavelength of the light emitted by the stylus according to the triggered light sensing element, so as to determine the identity information of the stylus according to the wavelength, i.e., step S1603 is performed. After determining the identity information of the stylus, the touch display device matches the identity information of the stylus with the preset identity information, and determines whether the identity information of the stylus belongs to the preset identity information, i.e., steps S1604 and S1605 are performed. Specifically, the identity information of the stylus can be matched with the preset identity information. If the identity information of the stylus is the same as the preset identity information, the identity information of the stylus belongs to the preset identity information. If the identity information of the stylus is not the same as the preset identity information, the identity information of the stylus does not belong to the preset identity information.

[0141] In the case that the identity information of the stylus belongs to the preset identity information, the identity information of the stylus is output, i.e., step S1606 is performed. In the case that the identity information of the stylus does not belong to the preset identity information or the identity information of the stylus is not obtained, it is considered that the object that is not the stylus touches the touch surface, i.e., it is considered that the user touches the touch surface by hand, i.e., step S1607 is performed.

[0142] In addition, when the stylus exists on the touch surface, the touch display device further determines the touch position of the stylus according to the position of the light sensing element that receives the light beam, i.e., step S1608 is performed.

[0143] After determining the touch coordinate of the stylus and whether it is the stylus (in the case that it is the stylus, the identity information of the stylus is included), the touch position and the information whether it is the stylus are integrated, and the touch position and the information whether it is the stylus are output to the application layer, so as to realize the "multi-pen multi-color" function and the like, i.e., steps S1609 and S1610 are performed.

[0144] The present application also provides a touch system, which comprises at least one stylus shown in any of the above embodiments and the touch display device shown in any of the above embodiments.

[0145] In the description of the present application, the description of the terms "the present embodiment", "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0146] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered sequence among or between the indicated features. Thus, features referred to as "first", "second", etc. can include at least one of the features, explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically limited.

[0147] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0148] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0149] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and simple improvement made on the basis of the essential content of the present application shall be included in the protection scope of the present application.

Claims

1. A stylus, characterized by The stylus comprises a stylus body, a light source, a first control device and a light path control assembly; The stylus body has a containing space; The first control device is located in the containing space and is configured to control the light source to emit light; The light source is located in the containing space or on the stylus body; The light path control assembly is arranged on the stylus body and is configured to guide the light emitted by the light source to a light sensing element in a touch display device, so that the touch display device determines a touch position of the stylus on a touch surface, wherein the touch surface is a surface of a display screen in the touch display device.

2. The stylus of claim 1, wherein, The first control device is further configured to determine coding information and control a working state of the light source based on the coding information, wherein the working state comprises at least one of a bright-dark state, a bright-dark switching frequency and a bright-dark duration, and the coding information is used to represent identity information of the stylus.

3. The stylus of claim 2, wherein, The number of the light sources is plural, and the wavelengths of the light emitted by each of the light sources are different. The first control device is further configured to control a working state of a target light source based on the coding information, wherein the target light source is one of the light sources.

4. The stylus of claim 2, wherein, The number of the light sources is plural, and the wavelengths of the light emitted by each of the light sources are the same. The first control device is further configured to control working states of the light sources based on the coding information.

5. The stylus of claim 1, wherein, The wavelength of the light emitted by the light source is a target wavelength, and the target wavelength is used to represent the identity information of the stylus.

6. The stylus of any one of claims 1 to 5, wherein The light path control assembly is configured to guide the light emitted by the light source out of the containing space and form at least two preset direction light beams outside the containing space, wherein the at least two preset direction light beams are in contact with at least one light sensing element, respectively.

7. The stylus of claim 6, wherein, The stylus body comprises a stylus tip and a stylus shaft, the stylus tip and the stylus shaft are connected, and the light path control assembly comprises a first light shield and a first reflecting element; The first reflecting element is located in the first light shield and has a first reflecting surface, and the first reflecting surface is configured to change a propagation direction of the light emitted by the light source; The first light shield is a part of the stylus tip, or the first light shield is a part of the stylus shaft, or the stylus tip and the stylus shaft are connected through the first light shield; The transmittance of the first light shield in the regions corresponding to the at least two preset directions is greater than a preset transmittance, or the first light shield in the regions corresponding to the at least two preset directions is provided with through holes.

8. The stylus of claim 7, wherein, The profile arithmetic average deviation of the first reflecting surface is less than or equal to a first preset value, and / or the micro-roughness ten-point height of the first reflecting surface is less than or equal to a second preset value, wherein the profile arithmetic average deviation and the micro-roughness ten-point height are indexes representing surface roughness of the first reflecting surface.

9. The stylus of claim 6, wherein, The pen body comprises a pen tip and a pen shaft, the pen tip and the pen shaft are connected, the light path control assembly comprises a second light cover and at least two second reflecting elements arranged along at least two preset directions, the at least two preset directions and the at least two second reflecting elements correspond to each other; The second reflecting element is located in the second light cover and has a second reflecting surface, the second reflecting surface is used for changing the propagation direction of the light emitted by the light emitting source and for making the light form a light beam corresponding to the preset direction; The second light cover is a part of the pen tip, or the second light cover is a part of the pen shaft, or the pen tip and the pen shaft are connected through the second light cover; The second light cover has a transmittance greater than a preset transmittance.

10. The stylus according to any one of claims 1 to 5, wherein, The stylus further comprises an energy storage component; The energy storage component is connected with the light emitting source and the first control device respectively, and is used for providing electric energy for the light emitting source and the first control device.

11. The stylus according to any one of claims 1 to 5, wherein, The light emitting source is an ultraviolet light emitting source, a visible light emitting source or an infrared light emitting source.

12. A touch display device, comprising: The display device comprises a display screen, a shell, a plurality of light sensing elements and a second control device; The shell is connected with the display screen; The plurality of light sensing elements are arranged on the shell and located at the edge of the display screen, and are used for sensing the light emitted by the stylus, wherein the stylus is the stylus as claimed in any one of claims 1 to 11; The second control device is used for determining the touch position of the stylus on a touch surface based on the position of the light sensing element that senses the light, wherein the touch surface is the surface of the display screen.

13. The touch display device according to claim 12, characterized in that, The second control device is further used for decoding the received light signal emitted by the stylus, and is used for determining the identity information of the stylus according to the decoded coding information.

14. The touch display device according to claim 12, characterized in that, The second control device is further used for determining the identity information of the stylus according to the wavelength of the received light emitted by the stylus.

15. The touch display device according to claim 12, wherein, The light sensing element is a photoresistor, a camera or an infrared receiving lamp.

16. A touch system, comprising: The display device comprises at least one stylus as claimed in any one of claims 1 to 11 and a touch display device as claimed in any one of claims 12 to 15.

Images